```css
/* Main CSS for Port Sudan Reads Initiative */
:root {
    --primary-color: #2c5aa0;
    --secondary-color: #f8f9fa;
    --accent-color: #ff6b35;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    direction: rtl;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color), #1e3a8a);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.min-vh-50 {
    min-height: 50vh;
}

.navbar-brand {
    font-size: 1.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #1e3a8a;
    border-color: #1e3a8a;
}

.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1) !important;
}

.social-links a {
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-color) !important;
}

.badge {
    font-size: 0.8rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-section {
        min-height: 60vh;
        text-align: center;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
}

/* Custom scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1e3a8a;
}
```